Android-mediaplayer playback

Understanding the medaiplayer oddities: 1. Once you set the data source of a mediaplayer, you cannot easily change it to another One-you'll have to create a new mediaplayer or call the reset () method to reinitialize the state of the player. 2.

Android self-use -- error: the user data image is used by another emulator. Aborting

  Cause: the locking mechanism of AVD is used. . Lock is a lock. If the program crashes or is not normally exited, the lock cannot be cleared. this problem occurs in the folder at the end of lock, that is, the AVD lock is not released, causing AVD

Android-Image Processing Method

Package com. IMG. util; Import Android. Graphics. Bitmap;Import Android. Graphics. bitmap. config;Import Android. Graphics. Canvas;Import Android. Graphics. lineargradient;Import Android. Graphics. matrix;Import Android. Graphics. paint;Import

Android self-use-service-related

  1. A service is a reliable component with unbounded boundaries. Reliability means that a service is generally not shut down when it is started, even if the application process of the service is killed, it also runs continuously, unless the memory

Android self-use -- windowmanager $ badtokenexception: unable to add window-Token null is n

Error generation:Java code { DP. Sh. toolbar. copytoclipboard (this); Return false; } "Href =" "> PrivateContext mcontext; @ Override Protected VoidOncreate (bundle

Android self-use-some activity-related skills in Android

Lock the screen direction XML Code when the activity is running Full Screen Activity   To make an activity run in full screen mode, you can add the following code implementation in its oncreate () method: Java code // set the full screen mode

Android-interaction between JS and Android

Http:// I modified it and added a simple comment. In this example, not only JS operations are performed, but Android browsers are also briefly introduced,I will explain

Android -- relativelayout attributes

RelativelayoutImportant attributes used:   Class 1: the property value is true or false.Android: layout_centerhrizontal horizontal centerAndroid: layout_centervertical vertical centerAndroid: layout_centerinparent is completely centered over the

Android self-use-intent Introduction

Reprinted! Intent is a run-time binding mechanism that connects two different components while the program is running. With intent, your program can express a request or willingness to Android. Android selects appropriate components based on the

Android self-use-intent action Daquan

String add_shortcut_action: Add a shortcut to the system .. "Android. Intent. Action. add_shortcut" String all_apps_action: lists all available applications. Input: none. "Android. Intent. Action. all_apps" String alternative_category type:

Android self-use -- asynctask implements asynchronous Processing Tasks

When developing Android applications, you must follow the single-thread model principle: Android UI operations are not thread-safe and must be executed in the UI thread. In a single-threaded model, you must always remember the following two rules: 1.

Android source code compilation make error handling

Download Android source code:Official download or refer to Android source code Download Method Android compiled version:Platform_version = 4.0.1 (latest Android 4.0.1) OS Operating System Platform:Linux Yanggang 2.6.35-30-generic # 61-ubuntu SMP Tue

Set common functions of Android activity (full screen, portrait screen, etc)

Activity Full Screen Settings Method 1:Androidmanifest. xml Method 2:Code Implementation Requestwindowfeature (window. feature_no_title); // hide the title bar Getwindow (). setflags (windowmanager. layoutparams. flag_fullscreen, windowmanager.

Android memory analysis tool

The Dalvik Virtual Machine supports garbage collection, but this does not mean you don't have to worry about memory management. Pay special attention to the memory usage of mobile devices. The memory space of mobile phones and tablets is limited. In

Android simpleadapter displays listview and gridview

Simpleadapter, as a dataset, mainly fills the listview and gridview containers with data and summarizes several filling methods. The principle is very simple. You can directly look at the code and 1. Single Row display of listview(Simple_list_item_1

Android sliding effect (1) -- viewflipper

ViewfilpperIt is a view container class officially provided by Android. It inherits from the viewanimator class and is used for page switching. You can also set the time interval for automatic playback.Viewanimator inherits framelayout, So multiple

Android slide effect BASICS (iii) -- gallery image copy set browsing

The Android system comes with a gallery image browsing application that allows you to smoothly display images when dragging your fingers. This provides excellent user interaction and experience. This example uses gallery and custom view to simulate

Android sliding effect (II) -- Gallery

Gallery is a view container class officially provided by Android. It inherits from the absspinner class and is used to achieve page slide effect. From the inheritance relationship above, we can see that the absspinner class inherits from

Android sliding effect BASICS (4) -- gallery + gridview

The Android system comes with two controls: the gridview and the gallery, which are displayed on the gridview mesh and browsed by gallery. The two controls can be combined to truly achieve the gallery browsing image effect. In this example, two

Android Service (iii) -- bindservice and remoteservice

I. Introduction to bindservice Bindservice is a binding service that executes the logical process in the service. The service starts using the context. startservice () method and stops using the context. stopservice () method. You can also stop

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